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Why does my JavaScript code receive a “No 'Access-Control-Allow-Origin' header is present on the req
...U flask-cors
Then include the Flask cors in your application.
from flask_cors import CORS
A simple application will look like:
from flask import Flask
from flask_cors import CORS
app = Flask(__name__)
CORS(app)
@app.route("/")
def helloWorld():
return "Hello, cross-origin-world!"
For mor...
Installing libv8 gem on OS X 10.9+
...se the --with-system-v8 option.
Using RubyGems:
gem install libv8 [-v YOUR_VERSION] -- --with-system-v8
Using Bundler (in your Gemfile):
bundle config build.libv8 --with-system-v8
Please note that if you intend to run your own V8, you must install both V8 and its headers (found in libv8-dev for ...
cleanest way to skip a foreach if array is empty [duplicate]
...ddition, this would work with objects implementing \Traversable, whereas is_array wouldn't work.
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Turn a simple socket into an SSL socket
...>
You will need to initialize OpenSSL:
void InitializeSSL()
{
SSL_load_error_strings();
SSL_library_init();
OpenSSL_add_all_algorithms();
}
void DestroySSL()
{
ERR_free_strings();
EVP_cleanup();
}
void ShutdownSSL()
{
SSL_shutdown(cSSL);
SSL_free(cSSL);
}
Now fo...
What is the difference between Numpy's array() and asarray() functions?
...rator); always copied.
There are also convenience functions, like asarray_chkfinite (same copying rules as asarray, but raises ValueError if there are any nan or inf values), and constructors for subclasses like matrix or for special cases like record arrays, and of course the actual ndarray const...
How does one unit test routes with Express?
... a more detailed example.
/// usercontroller.js
var UserController = {
_database: null,
setDatabase: function(db) { this._database = db; },
findUserByEmail: function(email, callback) {
this._database.collection('usercollection').findOne({ email: email }, callback);
}
};
module....
How to export/import PuTTy sessions list?
...
Only sessions:
regedit /e "%USERPROFILE%\Desktop\putty-sessions.reg" HKEY_CURRENT_USER\Software\SimonTatham\PuTTY\Sessions
All settings:
regedit /e "%USERPROFILE%\Desktop\putty.reg" HKEY_CURRENT_USER\Software\SimonTatham
Powershell:
Only sessions:
reg export HKCU\Software\SimonTatham\PuTT...
Who architected / designed C++'s IOStreams, and would it still be considered well-designed by today'
...
Several ill-conceived ideas found their way into the standard: auto_ptr, vector<bool>, valarray and export, just to name a few. So I wouldn't take the presence of IOStreams necessarily as a sign of quality design.
IOStreams have a checkered history. They are actually a reworking of an...
Can C++ code be valid in both C++03 and C++11 but do different things?
...c"
const char* s = u8"def"; // Previously "abcdef", now "def"
and
#define _x "there"
"hello "_x // Previously "hello there", now a user defined string literal
Type conversions of 0
In C++11, only literals are integer null pointer constants:
void f(void *); // #1
void f(...); // #2
template<int ...
How do you test running time of VBA code?
...st call .StartCounter and .TimeElapsed
Option Explicit
Private Type LARGE_INTEGER
lowpart As Long
highpart As Long
End Type
Private Declare Function QueryPerformanceCounter Lib "kernel32" (lpPerformanceCount As LARGE_INTEGER) As Long
Private Declare Function QueryPerformanceFrequency Lib ...